Yui Kamiji's victory over 23-time Grand Slam champion Diede de Groot in the gold medal match at the Paris Paralympics 2024 has sparked reactions from tennis fans. Kamiji, along with Manami Tanaka, also secured the gold in women's doubles, defeating the Dutch team.The defending champion de Groot was poised to add another gold medal to her collection, but the Japanese fought tooth and nail to take home the ultimate prize. The magnitude of the upset can be understood from the fact that the Dutch wheelchair champion has not lost any match at Grand Slams or Paralympics since the French Open 2020.De Groot's four-year streak was broken by the World No. 2 in a remarkable fashion. The 27-year-old won the first set 6-4 before Kamiji staged a comeback to win the next two sets 6-3, 6-4 and claim the gold medal. This victory adds to Kamiji's silver (in singles) and bronze (in singles and doubles) from previous Paralympic tournaments.Fans took to social media to react to this upset."Most shocking tennis result in this century," a fan wrote."This has to be one of the BIGGEST upsets in tennis history, crazy!!!!," another fan remarked.Another fan pointed out de Groot's dominance over the years."If you follow wheelchair tennis, you’ll understand how huge this is, considering Diede de Groot’s dominance in the sport. SO happy for Yui Kamiji," they wrote."Rome is falling," one fan hilariously quipped.One tennis enthusiast shared a clip of former footballer and commentator Gary Neville saying,"This was a no-brainer. This was the banker. This was the one that couldn't fail. This was the one that never failed.""Finally beating Diede de Groot and doing it in the gold medal match 😭 two gold medals for her what a beautiful moment," a fan wrote."Biggest upset in tennis history this century?." remarked another."This is fu**ing insane oh my god non tennis fans don’t understand just how big a deal this is😭😭😭," expressed another.Yui Kamiji and Manami Tanaka defeat Diede de Groot and Aniek van Koot to win the gold in women's doublesDiede de Groot and Aniek van Koot win silver at Paris Paralympic 2024 (Image via Getty)Diede de Groot and Aniek van Koot won the silver medal in women's doubles at the Paris Paralympics 2024, falling to Yui Kamiji and Manami Tanaka in the final. De Groot and van Koot advanced to the final by defeating Momoko Ohtani and Saki Takamuro of Japan 6-4, 6-1 in the quarterfinals and Li Xiaohui and Zhu Zhenzhen of China 6-2, 6-2 in the semifinals.In the final, de Groot and van Koot were stunned by the Japanese pair of Kamiji and Tanaka. The No. 1 seed started strong, winning the first set 6-3 before the Japanese staged a comeback to win the second set 7-6(3) and ultimately clinch the gold medal in a thrilling match tiebreak, 10-8.Diede de Groot had previously won two gold medals at the Tokyo Paralympics 2020 (singles and doubles) and silver at the Rio Paralympics 2016 (doubles).